CERN Accelerating science

All CERN Accelerators documents

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2018-07-19
07:39
Test Results of LARP 3.6 m ${\rm Nb}_{3}{\rm Sn}$ Racetrack Coils Supported by Full-Length and Segmented Shell Structures / Muratore, J F (Brookhaven Natl. Lab.) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven Natl. Lab.) ; Barzi, E (Fermilab) ; Bossert, R (Fermilab) ; Caspi, S (LBNL, Berkeley) ; Cheng, D W (LBNL, Berkeley) ; Cozzolino, J (Brookhaven Natl. Lab.) ; Dietderich, D R (LBNL, Berkeley) ; Escallier, J (Brookhaven Natl. Lab.) et al.
As part of the LHC Accelerator Research Program (LARP) to build a high performance quadrupole magnet with Nb$_3$Sn conductor, a pair of 3.6 m-long Nb$_3$Sn racetrack coils has been made at Brookhaven National Laboratory (BNL) and installed in two shell-type support structures built by Lawrence Berkeley National Laboratory (LBL). These magnet assemblies have been tested at 4.5 K at BNL to gauge the effect of extended length and prestress on the mechanical performance of the long structure compared to earlier short models. [...]
2009 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 19 (2009) 1212-1216
In : Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.1212-1216

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2018-07-19
07:39
Fabrication and Test of a 3.7 m Long Support Structure for the LARP ${\hbox{Nb}}_{3}{\hbox{Sn}}$ Quadrupole Magnet LQS01 / Ferracin, P (LBNL, Berkeley) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven Natl. Lab.) ; Bingham, B (LBNL, Berkeley) ; Bossert, R (Fermilab) ; Caspi, S (LBNL, Berkeley) ; Cheng, D W (LBNL, Berkeley) ; Felice, H (LBNL, Berkeley) ; Hafalia, A R (LBNL, Berkeley) ; Hannaford, C R (LBNL, Berkeley) et al.
The 3.7 m long quadrupole magnet LQS01 represents a major step of the US LHC Accelerator Research Program (LARP) towards the development of long Nb$_3$Sn accelerator quadrupole magnets for a LHC Luminosity upgrade. The magnet support structure is a scale up of the 1 m long Technology Quadrupole TQS design with some modifications suggested by TQS model test results. [...]
2009 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 19 (2009) 1106-1111
In : Applied Superconductivity Conference 2008, Chicago, IL, USA, 17 - 22 Aug 2008, pp.1106-1111

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2018-07-19
07:39
Test results of TQS03: A LARP shell-based Nb$_3$Sn quadrupole using 108/127 conductor / Felice, H (LBNL, Berkeley) ; Ambrosio, G (Fermilab) ; Bajko, M (CERN) ; Barzi, E (Fermilab) ; Bordini, B (CERN) ; Bossert, R (Fermilab) ; Caspi, S (LBNL, Berkeley) ; Dietderich, D (LBNL, Berkeley) ; Ferracin, P (LBNL, Berkeley) ; Feuvrier, J (CERN) et al.
Future insertion quadrupoles with large apertures and high gradients will be required for the Phase II luminosity upgrade (10$^{35}$ cm$^{−2}$s$^{−1}$) of the Large Hadron Collider (LHC). Although improved designs, based on NbTi, are being considered as an intermediate step for the Phase I upgrade, the Nb$_3$Sn conductor is presently the best option that meets the ultimate performance goals for both operating field and temperature margin. [...]
2010 - 14 p. - Published in : J. Phys. : Conf. Ser. 234 (2010) 032010 Fulltext: PDF;

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2018-07-17
04:14
Modeling and Measurements of Bunch Profiles at the LHC / Papadopoulou, S. (CERN) ; Antoniou, F. (CERN) ; Argyropoulos, T. (CERN) ; Hostettler, M. (CERN) ; Papaphilippou, Y. (CERN) ; Trad, G. (CERN)
At the LHC, the interplay between a series of effects (e.g. [...]
arXiv:1806.07317.
- 16 p.
Fulltext

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2018-07-17
04:14
Emittance reduction with variable bending magnet strengths: Analytical optics considerations / Papadopoulou, S. (CERN ; Crete U. ; Crete, Tech. U.) ; Antoniou, F. (CERN) ; Papaphilippou, Y. (CERN)
One of the main challenges of the lattice design of $e^+e^{{-}} $ synchrotrons, used as light sources or damping rings, is the minimization of the emittance. [...]
arXiv:1806.07318.
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2018-07-17
04:13
Design Development for the Beam Dump Facility Target Complex at CERN / Kershaw, K. (CERN) ; Grenard, J.-L (CERN) ; Calviani, M. (CERN) ; Ahdida, C. (CERN) ; Casolino, M. (CERN) ; Delavalle, S. (LeCroy, Oxford) ; Hounsome, D. (LeCroy, Oxford) ; Jacobsson, R. (CERN) ; Lamont, M. (CERN) ; Lopez Sola, E. (CERN) et al.
CERN has launched a study phase to evaluate the feasibility of a new high-intensity beam dump facility at the CERN Super Proton Synchrotron accelerator with the primary goal of exploring Hidden Sector models and searching for Light Dark Matter, but which also offers opportunities for other fixed target flavour physics programs such as rare tau lepton decays and tau neutrino studies. [...]
arXiv:1806.05920.
- 27 p.
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2018-07-16
20:11
Online Transverse Beam Instability Detection in the LHC. High Throughput Real-Time Parallel Data Analysis / Soderen, Martin
This thesis presents the ADT transverse instability detection system, the next generation of instability detection in the LHC at CERN, Geneva [...]
CERN-THESIS-2017-401 LIU-IDA/LITH-EX-A--17/053--SE. - 125 p.

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2018-07-16
18:42
Hit multiplicity approach to b-tagging in FCC-hh / Perez Codina, Estel (CERN) ; Roloff, Philipp Gerhard (CERN)
The FCC-hh project aims to study proton-proton collisions at $\sqrt{s}$=100 TeV. The ability to tag heavy flavour jets of high energy produced in those collisions will be crucial for many beyond the Standard Model searches such as Z' production. [...]
Geneva : CERN, 2018 Access to fulltext document: PDF;

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2018-07-13
04:46
Description of the luminosity evolution for the CERN LHC including dynamic aperture effects. Part I: the model / Giovannozzi, M. (CERN) ; Van Der Veken, F.F. (CERN)
In recent years, modelling the evolution of beam losses in circular proton machines starting from the evolution of the dynamic aperture has been the focus of intense research. [...]
arXiv:1806.03058.
- 31 p.
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2018-07-13
04:46
Description of the luminosity evolution for the CERN LHC including dynamic aperture effects. Part II: application to Run 1 data / Giovannozzi, M. (CERN) ; Van der Veken, Frederik F. (CERN)
In recent years, modelling the evolution of beam losses in circular proton machines starting from the concept of dynamic aperture its time evolution has been the focus of intense research. [...]
arXiv:1806.03059.
- 25 p.
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